:root {
  color-scheme: dark;
  --page-bg: #040404;
  --panel-bg: rgba(10, 10, 10, 0.82);
  --panel-border: rgba(255, 255, 255, 0.14);
  --text-main: #ffffff;
  --text-soft: rgba(255, 255, 255, 0.84);
  --text-muted: rgba(255, 255, 255, 0.58);
  --text-error: #ff8f8f;
  --accent: #f4f1de;
  --accent-strong: #fff7d6;
  --accent-deep: #23357e;
  --bubble-assistant: rgba(255, 255, 255, 0.08);
  --bubble-user: linear-gradient(180deg, #2846aa 0%, #1b2f77 100%);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.1), transparent 32%),
    linear-gradient(180deg, #0b0b0b 0%, #040404 55%, #000000 100%);
  color: var(--text-main);
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  font-family: "Orbitron", system-ui, sans-serif;
}

button,
textarea,
input {
  font: inherit;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  width: 14rem;
  height: 14rem;
  border-radius: 999px;
  opacity: 0.24;
  filter: blur(32px);
  pointer-events: none;
}

body::before {
  top: 4rem;
  left: -3rem;
  background: rgba(255, 255, 255, 0.16);
}

body::after {
  right: -4rem;
  bottom: 2rem;
  background: rgba(244, 241, 222, 0.12);
}

[hidden] {
  display: none !important;
}

.site-shell {
  width: min(100%, 42rem);
}

body[data-device="mobile"] .site-shell {
  width: min(100%, 24rem);
}

.hero-panel,
.gate-panel {
  position: relative;
  overflow: hidden;
  padding: 2.5rem 1.5rem;
  border: 1px solid var(--panel-border);
  border-radius: 1.75rem;
  background: var(--panel-bg);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  text-align: center;
}

.hero-panel::before,
.gate-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 42%);
  pointer-events: none;
}

.eyebrow {
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2rem, 9vw, 3.25rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: lowercase;
  line-height: 1.15;
  text-shadow: 0 0 24px rgba(255, 255, 255, 0.28), 0 0 2px rgba(255, 255, 255, 0.7);
}

.hero-panel h1,
.gate-panel h1 {
  margin-top: 0.75rem;
}

.tagline {
  margin-top: 1.4rem;
  font-size: clamp(0.98rem, 3vw, 1.15rem);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  opacity: 0.92;
  line-height: 1.6;
  color: var(--text-soft);
}

.gate-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  margin-top: 2rem;
}

.gate-button,
.gate-link {
  text-decoration: none;
  text-transform: lowercase;
  letter-spacing: 0.12em;
}

.gate-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: min(100%, 15rem);
  padding: 0.95rem 1.6rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent-strong) 0%, var(--accent) 100%);
  color: #050505;
  font-size: 0.86rem;
  font-weight: 700;
  box-shadow: 0 16px 40px rgba(244, 241, 222, 0.18);
}

.gate-link {
  color: var(--text-soft);
  font-size: 0.8rem;
}

.gate-note {
  margin-top: 1.2rem;
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  line-height: 1.7;
  text-transform: lowercase;
}

.gate-status,
.gate-error {
  margin-top: 1rem;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
  text-transform: lowercase;
}

.gate-status {
  color: var(--text-soft);
}

.gate-error {
  color: #ff8f8f;
}

.chat-shell {
  position: relative;
  overflow: hidden;
  min-height: min(100dvh - 2rem, 48rem);
  border: 1px solid var(--panel-border);
  border-radius: 1.75rem;
  background: var(--panel-bg);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.chat-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.08), transparent 48%);
  pointer-events: none;
}

.chat-container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: min(100dvh - 2rem, 48rem);
}

.chat-shell__header {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 1.2rem 0.9rem;
}

.chat-shell__header h1 {
  margin-top: 0.55rem;
  font-size: 1.4rem;
}

.chat-shell__logout {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  padding: 0.65rem 1rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: lowercase;
}

.chat-shell__greeting,
.chat-shell__status,
.chat-shell__error {
  text-transform: lowercase;
  line-height: 1.7;
}

.chat-shell__greeting {
  color: var(--text-main);
  margin-top: 0.8rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.chat-shell__status,
.chat-shell__error {
  padding: 0 1.2rem;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.chat-shell__status {
  color: var(--text-soft);
}

.chat-shell__error {
  color: var(--text-error);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.9rem 1rem 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.messages__group {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.empty-state {
  align-self: center;
  max-width: 16rem;
  padding: 1rem 1.1rem;
  border: 1px dashed rgba(255, 255, 255, 0.16);
  border-radius: 1rem;
  color: var(--text-muted);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  line-height: 1.7;
  text-align: center;
  text-transform: lowercase;
}

.bubble {
  display: flex;
  max-width: 86%;
}

.bubble.assistant {
  align-self: flex-start;
}

.bubble.user {
  align-self: flex-end;
}

.bubble__body {
  display: grid;
  gap: 0.65rem;
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1.15rem;
  box-shadow: 0 18px 38px rgba(0, 0, 0, 0.22);
}

.bubble.assistant .bubble__body {
  background: var(--bubble-assistant);
  border-bottom-left-radius: 0.3rem;
}

.bubble.user .bubble__body {
  background: var(--bubble-user);
  border-bottom-right-radius: 0.3rem;
}

.bubble__text {
  color: var(--text-main);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  line-height: 1.65;
  word-break: break-word;
}

.bubble__meta {
  color: var(--text-muted);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
}

.preview-list {
  display: grid;
  gap: 0.45rem;
  padding-left: 1rem;
}

.preview-list__item {
  color: var(--text-soft);
  font-size: 0.7rem;
  line-height: 1.6;
}

.bubble__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.bubble__button,
.input-bar__button,
.upload-preview__clear,
.gate-button,
.chat-shell__logout {
  cursor: pointer;
  transition: transform 150ms ease, opacity 150ms ease, background-color 150ms ease;
}

.bubble__button,
.input-bar__button,
.upload-preview__clear {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  padding: 0.65rem 0.9rem;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.08);
}

.bubble__button--ghost,
.input-bar__button--ghost,
.upload-preview__clear {
  background: rgba(255, 255, 255, 0.05);
}

.input-bar__button--recording {
  background: rgba(255, 100, 100, 0.24);
  border-color: rgba(255, 100, 100, 0.48);
  color: #ff8f8f;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.bubble__button:first-child,
.input-bar__button--primary {
  background: linear-gradient(180deg, var(--accent-strong) 0%, var(--accent) 100%);
  color: #050505;
}

.upload-preview {
  margin: 0 1rem 0.8rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.8rem 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.05);
  position: relative;
}

.upload-preview--ready {
  border-color: var(--accent);
  background: rgba(244, 241, 222, 0.08);
}

.upload-preview__status {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: upload-ready-pulse 2s ease-in-out infinite;
}

@keyframes upload-ready-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.9); }
}

.upload-preview__image {
  width: 3rem;
  height: 3rem;
  object-fit: cover;
  border-radius: 0.8rem;
}

.upload-preview__content {
  min-width: 0;
}

.upload-preview__name,
.upload-preview__meta {
  line-height: 1.5;
}

.upload-preview__name {
  font-size: 0.7rem;
  color: var(--text-main);
  word-break: break-word;
}

.upload-preview__meta {
  font-size: 0.66rem;
  color: var(--text-muted);
}

.upload-preview__progress {
  grid-column: 1 / -1;
  height: 0.25rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 0.4rem;
}

.upload-preview__progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-strong) 100%);
  border-radius: 999px;
  transition: width 0.15s ease-out;
}

.input-bar {
  display: grid;
  gap: 0.8rem;
  padding: 0.9rem 1rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(0, 0, 0, 0.22);
}

.input-bar__field {
  width: 100%;
  min-height: 3.1rem;
  max-height: 9rem;
  resize: none;
  padding: 0.95rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-main);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  line-height: 1.55;
}

.input-bar__field::placeholder {
  color: rgba(255, 255, 255, 0.44);
}

.input-bar__actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

button:hover,
button:focus-visible,
.gate-link:focus-visible {
  outline: none;
  transform: translateY(-1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
  transform: none;
}

@media (min-width: 768px) {
  body {
    padding: 2.5rem;
  }

  .hero-panel,
  .gate-panel {
    padding: 3.5rem 3rem;
  }

  .gate-actions {
    margin-top: 2.4rem;
  }

  .chat-shell {
    min-height: 44rem;
  }

  .chat-container {
    min-height: 44rem;
  }

  .chat-shell__header {
    padding: 1.8rem 1.8rem 1rem;
  }

  .messages {
    padding: 1rem 1.8rem 0.5rem;
  }

  .upload-preview,
  .input-bar,
  .chat-shell__status,
  .chat-shell__error {
    margin-left: 0;
    margin-right: 0;
    padding-left: 1.8rem;
    padding-right: 1.8rem;
  }

  .upload-preview {
    margin-bottom: 1rem;
  }

  .input-bar__actions {
    grid-template-columns: minmax(6rem, 7rem) minmax(6rem, 7rem) 1fr;
  }
}